Base for adjustable tubular lamp bulb



FIG. 1 is a top, front perspective view of a base for adjustable tubular bulb showing my new design;

FIG. 2 is a front elevational view thereof on an enlarged scale;

FIG. 3 is a side elevational view thereof on an enlarged scale;

FIG. 4 is a top plan view thereof on an enlarged scale;

FIG. 5 is a rear elevational view thereof on an enlarged scale; and

FIG. 6 is a bottom plan view thereof on an enlarged scale. 

The ornamental design for a base for adjustable tubular lamp bulb, as shown and described. 